HP ProCurve J4858C X121 1000BASE-SX SFP Transceiver Module J4858C

Description:

The HP ProCurve J4858C (X121) is a 1000BASE-SX SFP transceiver module designed for Gigabit Ethernet fiber connectivity on HP/Aruba networking equipment. It provides high-speed data transmission over multimode fiber using an LC duplex connector. Commonly used in enterprise networks, switches, and routers, it enables reliable short-range fiber links for data center and industrial networking applications.

Applications:

The HP ProCurve J4858C SFP module is used in networking systems requiring high-speed fiber connectivity. Typical applications include enterprise switches, data centers, industrial networks, and server connections where reliable Gigabit communication over short distances is critical to network performance.

Technical Specifications:

• Manufacturer Part Number (MPN): J4858C
• Product Type: SFP Transceiver Module (Mini-GBIC)
• Series: HP ProCurve / Aruba X121
• Data Rate: 1 Gbps (Gigabit Ethernet)
• Standard: 1000BASE-SX
• Wavelength: 850 nm
• Fiber Type: Multimode fiber (MMF)
• Max Distance:
• Up to 550 m (50/125 µm MMF)
• Up to 220 m (62.5/125 µm MMF)
• Connector Type: Duplex LC
• Transmission Mode: Full duplex
• Power Consumption: ~1 W
• Operating Temperature: 0°C to 70°C (commercial)
• Form Factor: Hot-pluggable SFP (Mini-GBIC)
• Compatibility: HP ProCurve / Aruba switches and networking equipment
• Status: End of Sale (EOS), widely available as replacement/compatible

Common Replacements:

• HP J4858D (newer Aruba equivalent)
• HP JL745A (TAA-compliant SX SFP)
• Generic/compatible 1000BASE-SX SFP modules